Know Your Environment. Protect Your Health.

Chloromethane

El Oso Water Supply Corporation

Chloromethane is an industrial solvent, aerosol propellant and a refrigerant. It also forms as a byproduct of water disinfection. The EPA classifies chloromethane as possibly carcinogenic to humans.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND20ND
2019ND20ND
2020ND40ND
2021ND20ND
2022ND20ND
2023ND30ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 2.69 ppb

The EWG Health Guideline of 2.69 ppb for chloromethane was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2018-01-24AE10200ND
2018-01-24AE10234ND
2019-02-19AE54844ND
2019-02-19AE54850ND
2020-06-09AF14659ND
2020-06-09AF14661ND
2020-09-11AF27359ND
2020-11-13AF34597ND
2021-01-26AF41115ND
2021-01-26AF41117ND
2022-03-10AF88679ND
2022-03-10AF88683ND
2023-02-16AG29365ND
2023-02-16AG29367ND
2023-03-29AG34750ND